The ACT31B is a single-button keychain remote designed for garage door openers and access control systems operating at 318 MHz. Factory-precoded with unique ID and facility codes, it delivers block-coded security comparable to traditional Wiegand cards. The compact design fits easily on a keyring for convenient carry. Programming into system memory requires only entering the first and last number of the coding block into your controller—enrollment can be completed via software or manual keypad entry depending on your controller type. Ideal for applications requiring a single remote control function.